3 years ago

Emily exercised from 4:05 p.m.to 4:32 p.m. For what part of an hour did Emily exercise ? Write the fraction in simplest form

1 answer:

7 0

She exercised for 27/60 of an hour so if you divide that by 3 you get 9/20 and therefore, she exercised for 9/20 of an hour.

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If you flip a fair coin 7 times, what is the probability that you will get exactly 4 tails?

andre [41]

Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Step-by-step explanation:

We need to find the probability that you will get exactly 4 tails, if you flip a fair coin 7 times.

This is the combination question.

The total combinations will be: 2^7=128

Now, finding number of ways we can get exactly 4 tiles:

We will use the formula:

$^nC_k=\frac{n!}{k!(n-k)!}$

in our given question, n= 7, k= 4

Putting values:

$^nC_k=\frac{n!}{k!(n-k)!}\\^7C_4=\frac{7!}{4!*3!}\\ ^7C_4=\frac{7*6*5*4!}{4!*3!}\\ ^7C_4=\frac{7*6*5}{6}\\ ^7C_4=35$

So, Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Keywords: Probability

Learn more about Probability at:

#learnwithBrainly

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3 years ago

solve each triangle. round each side length to the nearest tenth and angle measures to the nearest degree. a= 14, c= 20, B= 38 d

slavikrds [6]

A) the missing degree is 166

b) the missing degree is 142

c)the missing degree is 160

I do hope I helped you in a way! If I am incorrect I apologize.

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3 years ago

Read 2 more answers

The volume of a cone is 164 cubic feet. Its height is 12 feet. Ashlyn is finding the area of the base of the cone. Her work is

sveticcg [70]

Answer:

Step-by-step explanation:

just got 100 percent on quiz

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3 years ago

Describe 2 ways that an exterior angle of a triangle is related to one or more or the interior angles

shtirl [24]

The 2 angles at a vertex are supplementary (one interior and one exterior) the exterior angle is = the the sum of the 2 remote interior angles..

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3 years ago

Moses earns a gross salary of 10 500 per month. th basic monthly expenses used from the income are as follows ,housing expense 2

Zolol [24]

Answer:

$126000

Step-by-step explanation:

Gross salary per month = $10500

Gross salary per annum

= Gross salary per month × 12

= $10500 × 12

= $126000

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3 years ago